Covering for steam pipes or boilers



(No Model.) P COVERING FOR STEAM PIPES 0R BOILERS.

.No. 411,091 Patented Sept. 17, 1889.

UNITED STATES PATENT OFFICE.

PHILIP CAREY, OF CINCINNATI, OHIO.

COVERING FOR STEAM PIPES OR BOILERS.

SPECIFICATION forming part of Letters Patent No. 411,091, dated September 17, 1889.

' Application filed May 10, 1889. Serial No. 810,301. (No model.)

To all whom it may concern:

Be it known that I, PHILIP CAREY, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented a certain new and useful Improvement in Coverings for Steam Pipes and Boilers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to covering for steampipes, boilers, and the like, in which the covering is made in sections of convenientlength, so that the covering can be easily applied and removed. I

The object of my invention is to produce a sectional covering made of prepared layers of flexible material so fastened together that the covering may be adapted to fit various sizes of pipe and the strength and durability of the covering largely increased.

The novelty of my invention will be more fully hereinafter set forth in the specification and pointed out in the claims.

In the accompanying drawings, Figure 1 is a sectional view, in perspective, of a portion of one section of the covering complete and ready to be inclosed around the pipe, which is also shown. Fig. 2 is a cross-section of a section of the covering complete and in place. Fig. 3 is a sectional view, in perspective, of a portion of one section of the covering with a number of the inside layers removed. Fig. 4 is a cross-section of the covering shown in Fig. 3 in place on the pipe with air-chamber. Fig. 5 is a side view of the covering shown in Fig. 4:, partly in section, showing the sectional rings. Fig. 6 is a perspective view of one of the rings.

Like letters of reference indicate identical parts in all the figures.

It is usual in coverings of this kind to bind the layers together with paste, which soon loses its vitality on account of the heat and destroys the solidity and character of the covering. .In order to overcome these difficulties I make my covering, as already stated, of a roll of corrugated paper or otherflexible material rolled into layers to any thickness desired. This paper is coated 011 one or both sides by a layer of magnesia, fossil-meal,

, slaked lime, or other pulpy fire-proof matesuitable tank, the paper of a width of about three feetthe usual length of a section-is then passed over this tank and one or both sides coated with the composition by machinery. The paper is then passed to the mandrels to be wrapped and wound in layers to any thickness desired.

In the drawings, Figs. 1 and 2, A is the roll of corrugated paper wound into nine layers. In order to fasten the different layers together I use staples, wooden pegs, or other suitable nails a, which are driven in preferably while the roll is still in the mandrel. These pegs or nails I dip in soluble glass before driving them to place, and thus bind the different layers together more firmly. The top layer is detached from the roll for a short distance, as shown at b, Fig. 1, and the pegs are then driven underneath this flap, as shown in Fig. 2, and in the opposite side of the roll also, or wherever else is found serviceable. To enable the section to be conveniently attached to the pipe, the roll is then out almost into two semi-cylindrical parts, two or three of the outside layers only being left to form a hinge, so that the covering can be opened sufficiently to be passed around the pipe, as clearly shown in Fig; 1. My method of thus fastening the different layers together with pegs I find of great advantage, as it obviates the necessity of the use of paste to hold the layers together. The heat to which the covering is subjected soon destroys the vitality of the paste, so that the ordinary paper coverings often fall apartwhen being removed.

Ifind another great advantage in thus combining the layers together by means of pegs, as each layer is independent of the other and can be removed from the inside layer by layer, and the covering made suitable for differentsized pipes, as it very often happens that changes are made in case of repairs in the sizes of pipe in an establishment, which renders the ordinary pipe-covering useless; but with my improved covering the inside layers may be removed until the roll will fit the larger size of pipes, as shown in Figs. 3 and 4E. The pins to a can then be turned down, as shown at c, Fig. 3.

I am aware that staples have been used for holding coverin together on pipes, but not for combining the different layers together for the purpose intended.

I am also aware that plaster has been used between layers of felt to render the material fire-proof; but this plaster under the action of heat soon becomes hard and compact, and so fails to meet the requirements.

I am further aware that paper coverings have been sewed or wired together at their edges for the purpose of holding the different layers together; but in case it is necessary to remove one or more layers to fit the covering to a larger-sized pipe the wire or twine has to be cut, thereby rendering the covering useless for reapplication, as the different layers neecssarily fall apart when the wire or twine is cut.

In order to protect the covering from charring on the pipes where there is an intense heat, I form an air-chamber between the pipe and the covering by means of composition rings 13, made of any suitable fire-proof material and molded into two semi-cylindrical parts. Strips of wire or other flexible material 5, Fig. 6, are inserted into the composition while in the mold to strengthen the material and at the same time to form a hinge, so that the rings can be easily adjusted and removed. A

ilap C is also attached to one of the semi-cylinders to cover the joint, and when in placeI find it convenient to fasten the llap down by means of a peg 0r pin 12, Fig. 5. \Vhen the sections of covering are in place on the pipe, I cover the joints where the sections abut by strips of paper or other flexible material, which are held in place by means of tie-wires, as shown in my patent, No. 388,260, on coverings for steam pipes and boilers.

Having thus described my invention, what I claim, and desire to secure by Letters Patent,

1. A removable covering for steam-pipes, made in sections and composed of a continuous roll of flexible material coated on one or both sides with magnesia, fossilaneal, slaked lime, or other pulpy fire-proof composition, and partially bisected, substantially as and for the purpose described.

2. In aremovable covering for steam-pipes, the combination with a fireproof coated flexible material rolled into layers, of pegs or nails inserted therein to bind the layers together, in the manner and for the purpose specified.

In a removable covering for steam-pipes, the combination, with a flexible fire-proof material rolled into layers, of composition rings formed in semi-cylindrical parts strengthened and hinged by wire or other llexible material embedded in the same, substantially as and for the purpose described.

PHILIP CAREY.

Witnesses: 7

JOHN A. Sclmi-nva'rii', ALFRED M. ALLEN. 

